function insertAtCursor(myField, myValue) {
	//IE support
	if (document.selection) {
		myField.focus();
		sel = document.selection.createRange();
		sel.text = myValue;
		sel.select();
	}
		//MOZILLA/NETSCAPE support 
	else if (myField.selectionStart || myField.selectionStart == '0') {
		var startPos = myField.selectionStart;
		var endPos = myField.selectionEnd;
		// save scrollTop before insert www.keleyi.com
		var restoreTop = myField.scrollTop;
		myField.value = myField.value.substring(0, startPos) + myValue + myField.value.substring(endPos, myField.value.length);
		if (restoreTop > 0) {
		myField.scrollTop = restoreTop;
		}
		myField.focus();
		myField.selectionStart = startPos + myValue.length;
		myField.selectionEnd = startPos + myValue.length;
	} else {
		myField.value += myValue;
		myField.focus();
	}
} 

function index_in_array(value,array){
	for(var i = 0; i < array.length; i++){
		var v = array[i];
		if(v == value){
			return i;
		}
	}
	return -1;
}

function replace_qq_emoji(str){
	str = str.replace(/\[.*?\]/g, function(word){
		var w = word.replace('[','').replace(']','');
		var index = index_in_array(w,qq_emoji);
		// console.log(index);
		return '<img class="qq_emoji" src="images/qq_emoji/Expression_' + (index + 1) + '@2x.png" />';
	}); 
	return str;
}

function set_water(){
  var water = $('#iphone .i-water');
  if(!water.length){
    $('#iphone').append('<div class="i-water"></div>');
  }
}

// 对Date的扩展，将 Date 转化为指定格式的String 
// 月(M)、日(d)、小时(h)、分(m)、秒(s)、季度(q) 可以用 1-2 个占位符， 
// 年(y)可以用 1-4 个占位符，毫秒(S)只能用 1 个占位符(是 1-3 位的数字) 
// 例子： 
// (new Date()).Format("yyyy-MM-dd hh:mm:ss.S") ==> 2006-07-02 08:09:04.423 
// (new Date()).Format("yyyy-M-d h:m:s.S")      ==> 2006-7-2 8:9:4.18 
Date.prototype.format = function(fmt) 
{ //author: meizz 
  var o = { 
    "M+" : this.getMonth()+1,                 //月份 
    "d+" : this.getDate(),                    //日 
    "h+" : this.getHours(),                   //小时 
    "m+" : this.getMinutes(),                 //分 
    "s+" : this.getSeconds(),                 //秒 
    "q+" : Math.floor((this.getMonth()+3)/3), //季度 
    "S"  : this.getMilliseconds()             //毫秒 
  }; 
  if(/(y+)/.test(fmt)) 
    fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length)); 
  for(var k in o) 
    if(new RegExp("("+ k +")").test(fmt)) 
  fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length))); 
  return fmt; 
}

function get_random_num(Min,Max){   
	var Range = Max - Min;   
	var Rand = Math.random();   
	return(Min + Math.round(Rand * Range));   
}   

function randomString(len,words) {
　　len = len || 32;
　　var $chars = '0123456789'; 
	if(words){
		$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
	}
　　var maxPos = $chars.length;
　　var pwd = '';
　　for (i = 0; i < len; i++) {
　　　　pwd += $chars.charAt(Math.floor(Math.random() * maxPos));
　　}
　　return pwd;
}
